10 LF957RPDA-OSY-CFM-FS
Item Number: F124736
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$28,168.73
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Brand - Watts
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- Size: 10 inch
- Weight: 997.0 lb
- Maximum Working Pressure: 175 psi
- Body Material: 304 Stainless Steel
- Shutoff Valves: UL & FM Approved OSY Resilient Seated Gate Valves
- Flood Sensor: SentryPlus Alert technology included
- Detector Meter: Cubic Foot Per Minute (CFM) Meter
- Connections: 150 pound ANSI/AWWA Class D Flanged
- Approvals: ASSE 1047, CSA B64.4, UL, FM, NSF
Description
Description
This 10 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly prevents reverse flow and contamination in water systems where health hazards exist. Featuring a compact 304 stainless steel body, it includes UL and FM approved OSY resilient seated gate valves and a cubic foot per minute meter for leak detection. The integrated flood sensor with SentryPlus Alert technology detects continuous discharge from the relief valve, offering advanced monitoring. Approved by ASSE, CSA, UL, FM, and NSF, this assembly is designed for horizontal installation with 150 pound ANSI/AWWA Class D flanged connections. It operates between 33°F-110°F with a maximum working pressure of 175 psi. Item number F124736.
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Connections
- The assembly utilizes 150 pound ANSI/AWWA Class D flanged connections for secure installation into compatible piping systems. These robust flanges ensure a reliable and leak-tight connection for the 10 inch pipe diameter.

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Additional Details
This 10 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly helps stop the reverse flow of liquids due to backpressure or backsiphonage, preventing contamination in water systems where health hazards exist.
Features
- Extremely compact design, lighter than traditional backflow preventers
- Bottom mounted relief valve reduces clearance requirements when installed against an outside wall
- Furnished with a cubic foot per minute (CFM) meter to detect underground leaks and unauthorized water use
- Designed for horizontal pattern installation
Construction
- 304 stainless steel body with a quick access sleeve for easy maintenance
- Two independent torsion spring check valves with reversible elastomer discs
- UL and FM Approved outside stem and yoke (OSY) resilient seated gate valves
- Corrosion resistant bottom mounted pressure relief valve
- Lead Free* bronze body for test cocks
Flood Detection & Monitoring
- Integrated flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve
- Add-on sensor connection kit available to extend flood monitoring on compatible assemblies
- Integrates with the Sensor Control Monitor to deliver maintenance alerts to BAS via RS-485 Modbus or the Nexa platform by Wi-Fi connectivity
Specifications
- Size: 10 inch
- Maximum Working Pressure: 175 psi (12.1 bar)
- Temperature Range: 33°F-110°F (0.5°C-43°C)
- Installation: Horizontal Pattern
Connections
- Inlet/Outlet: 150 pound ANSI/AWWA Class D Flanged
Materials
- Housing & Sleeve: 304 (Schedule 40) Stainless Steel
- Elastomers: EPDM, Silicone, and Buna 'N' Noryl®
- Torsion Spring Checks: Stainless Steel
- Check Discs: Reversible Silicone or EPDM
- Test Cocks: Lead Free* Bronze Body
- Pins & Fasteners: 300 Series Stainless Steel
- Springs: Stainless Steel
Certificates & Approvals
- Approved by the Foundation for Cross-Connection Control and Hydraulic Research at The University of Southern California (FCCCHR-USC)
- AWWA C511-97
- ASSE 1047
- CSA B64.4
- UL Classified
- FM Approved
- NSF Certified to NSF/ANSI 372
FAQs
What is the primary function of this backflow preventer?
This 10 inch Lead Free Reduced Pressure Detector Backflow Preventer Assembly is designed to prevent the reverse flow of liquids caused by backpressure or backsiphonage, safeguarding water systems from contamination where health hazards exist.
What is the purpose of the integrated flood sensor?
The assembly features a flood sensor with SentryPlus Alert technology to detect continuous discharge from the relief valve. It can also integrate with an add-on sensor connection kit for advanced monitoring and alerts.
What type of connections does this assembly use?
This assembly is equipped with 150 pound ANSI/AWWA Class D flanged connections for both inlet and outlet, ensuring secure installation into compatible piping systems.
What materials are used in its construction?
The housing and sleeve are constructed from 304 stainless steel. Other components include EPDM, silicone, and Buna 'N' Noryl® elastomers, stainless steel torsion spring checks, and a Lead Free* bronze body for the test cocks.
What are the operating temperature and pressure limits?
The assembly has a temperature range of 33°F to 110°F (0.5°C to 43°C) and a maximum working pressure of 175 psi (12.1 bar).
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